Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
chardetect3 --version (return code: 0)
chardetect3 2.3.0
chardetect3 HELP (return code: 2)
usage: chardetect3 [-h] [--version] [input [input ...]]
chardetect3: error: argument input: can't open 'HELP': [Errno 2] No such file or directory: 'HELP'